Treating hirsutism typically requires a combination of approaches: medication to slow new hair growth and physical removal methods to address existing hair. Most treatments take at least six months to show visible results because facial hair has a growth cycle of about four months, meaning any intervention needs time to catch up with hairs already in progress. Nine months is a more realistic timeline for seeing the full effect of a given treatment.
Why Treatment Takes So Long
Hair doesn’t grow in one continuous strand. Each follicle cycles through phases of active growth, rest, and shedding. Facial hair spends roughly four months in its active growth phase. A medication that starts working today won’t visibly affect a hair that’s already partway through its cycle. This is why the standard recommendation is to stick with any treatment for at least six months before deciding it isn’t working. Switching too early can make it seem like nothing helps, when the real issue is timing.
Birth Control Pills as First-Line Treatment
For most women who aren’t trying to get pregnant, oral contraceptives are the recommended starting point. They work by raising levels of a protein in the blood that binds to testosterone, effectively reducing the amount of free testosterone available to stimulate hair follicles. All combination birth control pills have this effect to some degree.
If you’re at higher risk for blood clots (for example, if you’re over 39 or have obesity), a pill with a lower estrogen dose and a lower-risk progestin is typically preferred. The goal is to balance effectiveness against side effects.
After six months on a birth control pill alone, if hair growth hasn’t improved enough, the next step is adding an antiandrogen medication. Starting with both at once isn’t generally recommended as a first approach, with one exception: women with severe hirsutism causing significant emotional distress may benefit from combination therapy right away.
Antiandrogen Medications
Spironolactone is the most commonly used antiandrogen for hirsutism. It blocks the body’s androgen receptors, preventing testosterone from triggering hair growth. Typical doses range from 50 to 200 mg daily, and it’s generally used alongside birth control because it can cause birth defects if taken during pregnancy.
Women who aren’t sexually active, have had permanent sterilization, or use a long-acting contraceptive like an IUD can use antiandrogens without necessarily being on a birth control pill. But for most women, the two are used together.
Finasteride is another option, sometimes prescribed off-label. It works differently, blocking the enzyme that converts testosterone into a more potent form. Doses for women typically range from 1 to 5 mg daily. Like spironolactone, it’s classified as strictly contraindicated in pregnancy and breastfeeding due to the risk of harm to a male fetus or infant.
What About Metformin?
Metformin, commonly used for insulin resistance in polycystic ovary syndrome (PCOS), has a modest effect on hirsutism. In clinical trials, it reduced hirsutism scores from about 17.5 to 15.8 on a standardized scale. That’s statistically significant but not dramatic. Metformin is more useful for its metabolic benefits in PCOS than as a standalone hirsutism treatment.
Topical Treatment for the Face
A prescription cream containing eflornithine slows facial hair growth by blocking an enzyme that hair-producing cells need to multiply. Applied twice daily, it produces a measurable reduction in hair thickness and growth rate within about eight weeks. It doesn’t remove hair on its own, so it’s used alongside other removal methods. When combined with light-based treatments, about 90% of women saw meaningful improvement at six months, compared to about 70% with light treatments alone.
The cream only works while you’re using it. If you stop, hair growth returns to its previous rate within a couple of months.
Laser Hair Removal and Electrolysis
Physical hair removal is often the most immediately satisfying part of treatment because it addresses existing hair rather than waiting months for medication to take effect.
Laser hair removal targets pigment in the hair follicle, making it most effective on dark hair against lighter skin, though newer devices work on a broader range of skin tones. In a direct comparison study, laser achieved a 74% clearance rate six months after starting treatment, versus 35% for electrolysis over the same period. Laser is also significantly faster per session and generally less painful.
Electrolysis destroys individual follicles one at a time using an electric current. It’s slower and requires more sessions, but it works on all hair colors, including light, red, and gray hairs that laser can’t target. It’s the only method officially classified as permanent hair removal.
Most people need multiple sessions of either method. In clinical comparisons, laser typically required three sessions spaced four weeks apart, while electrolysis required four sessions at three-week intervals to achieve its (lower) clearance rates. Real-world treatment courses are often longer, depending on the area being treated and the density of hair.
Weight Loss and Lifestyle Changes
For women who are overweight, losing as little as 5% of body weight can lower testosterone levels and raise the protein that binds testosterone, reducing the amount available to stimulate hair follicles. A low-glycemic diet (one that minimizes blood sugar spikes) has shown particular promise in reducing free androgen levels within 60 days, even before significant weight loss occurs.
Weight loss alone won’t eliminate hirsutism, but it can make other treatments more effective, especially for women whose excess hair growth is linked to PCOS or insulin resistance.
Putting a Treatment Plan Together
Hirsutism severity is measured on a standardized scoring system that rates hair growth across nine body areas. A score below 8 is considered normal, 8 to 15 is mild, and above 15 is moderate to severe. Where you fall on this scale helps determine how aggressive treatment needs to be.
For mild cases, a birth control pill plus physical hair removal (shaving, waxing, or laser) may be enough. For moderate to severe cases, adding an antiandrogen after six months of birth control is the typical next step. Topical eflornithine cream can be layered on for facial hair at any stage.
The most important thing to understand is that hirsutism treatment is a long game. You’re not doing something wrong if you don’t see results at three months. The biology of hair growth means that six months is the minimum evaluation window, and nine months is when you’ll see the full picture of whether a given approach is working.